Applying the Verifiability Approach in an international airport setting

In the current study, we tested the utility of applying the Verifiability Approach (VA) within an international airport setting. The VA works on the notion that truth tellers provide more verifiable details than liars and has shown to be successful within other empirical deception detection scenarios. Three hundred and ninety-nine airside participants (those originating from Europe, Asia and African) were asked questions regarding their travel plans. We asked participants to either lie (n?=?195) or tell the truth (n?=?204) about their planned activities. The critical question required participants to provide information that would convince the investigator that they were telling the truth. We then transcribed and coded their responses for verifiable details; that is, details that could potentially be checked by an investigator. Overall, truth tellers provided significantly more verifiable details than liars. Furthermore, when taking their geographical origin into account, there was no interaction effect between veracity and region. Additionally, truth tellers provided a higher verifiable/total detail ratio than liars, which again showed no interaction effect between veracity and region. These findings support the suitability of the VA as a cross-cultural veracity tool and implications for its use as an additional security aid are discussed.     

Fading lies: applying the verifiability approach after a period of delay

ABSTRACT

We tested the utility of applying the Verifiability Approach (VA) to witness statements after a period of delay. The delay factor is important to consider because interviewees are often not interviewed directly after witnessing an event. A total of 64 liars partook in a mock crime and then lied about it during an interview, seven days later. Truth tellers (n?=?78) partook in activities of their own choosing and told the truth about it during their interview, seven days later. All participants were split into three groups, which provided three different verbal instructions relating to the interviewer’s aim to assess the statements for the inclusion of verifiable information: no information protocol (IP) (n?=?43), the standard-IP (n?=?46) and an enhanced-IP (n?=?53). In addition to the standard VA approach of analysing verifiable details, we further examined verifiable witness information and verifiable digital information and made a distinction between verifiable details and verifiable sources. We found that truth tellers reported more verifiable digital details and sources than liars.     

A “weapon focus” effect in children

In this paper we examined beliefs about deception held by legal professionals. Three groups of presumed expert lie-catchers were investigated: police officers ( n =104), prosecutors ( n =158), and judges ( n =251). The experts' beliefs about deception were remarkably inconsistent with the general pattern resulting from studies mapping actual cues to deception. For example, a majority of police officers believed there is a strong relationship between (a) deceptive behaviour and gaze aversion and (b) deceptive behaviour and an increase in body movements. The scientific literature does not support this view. Furthermore, all three professional groups believed that truthful consecutive statements are more consistent than deceptive, and that it is easier to detect deception in interactive than non-interactive contexts. Research on deception shows the opposite. For five of the seven investigated items we found significant between-group differences. Both the genesis and the implications of these differences are discussed. Judging from self-ratings, the presumed experts admitted knowing close to nothing about scientific research on deception.     

When context matters: how false,truthful, and genre-related communication styles are revealed in language

ABSTRACT

In this preregistered experiment, we address an understudied question in the deception and language literature: What is the impact of context on false and truthful language patterns? Drawing on two theories, Truth-Default Theory and the Contextual Organization of Language and Deception model, we instructed participants (N?=?639) to lie, tell the truth, or write within a genre without explicit lying or truth-telling instructions across different topics (e.g. their friends, attitudes on abortion). The results successfully replicate several cue-based models for self-references and negative affect, such as the Newman Pennebaker model of deception. Participants without lying or truth-telling instructions, but who wrote within genre conventions, showed markedly similar patterns to truth-tellers, though indicators of analytic thinking, adjectives, and auxiliary verbs were distinct. The data were also evaluated with a topic modeling approach and suggest that the abortion process was construed negatively when people lied about the topic. Truth-tellers construed abortion in objective terms and genre-related speech highlighted key role-players (e.g. the government, men, women, baby). We discuss how these data advance deception and language theory.     

Temperature fluctuations at sympathetic preganglionic neuron sites in the thoracolumbar section of the spinal column as cues to deception: a preliminary study

In this experiment, both thermal imaging and the Concealed Information Test (CIT) methodologies were adopted, for the first time, to explore the efficacy of the thermal imaging of the thoracolumbar (T1–L3) region of the spinal column within the context of deception detection. Thirty-one participants followed a CIT-based structured interview process in a low-stakes laboratory setting whereby temperature fluctuations induced by the preganglionic neurons in the spinal column were measured with a thermal imaging camera during verbal responses to interview questions. The degree of temperature changes was then analyzed in order to determine truthfulness and deceit. Thermal imaging of the thoracolumbar region of the spinal column during sympathetic activation was effective in determining truthful responses with an accuracy rate of 91.9% and deceitful responses with an accuracy rate of 71.0%. Current findings support the potential use of temperature fluctuations of preganglionic neuron sites in the thoracolumbar section for lie-detection purposes.     

On the economics of plagiarism

Cheating and plagiarism can involve the transgression of intellectual property rights across many areas of life. When a direct financial benefit from such practices is identifiable, the opportunity to seek legal redress is available via civil court action. When it is undertaken by a public official it may constitute malfeasance. Yet in the case of breaches of university regulations (from the growing number of student cheating and plagiarism incidents) subsequent legal intervention may be characterised by situations where the university is the defendant and the alleged plagiarist is the plaintiff (seeking compensation for interrupted study and/or tarnished reputation). University defences can flounder around the issue of proving intent to deceive. What can they do to try to prevent such occurrences? This paper uses economic analysis to examine such issues. Economic models of plagiarism motivated primarily by (i) time-saving and (ii) dishonesty are developed to help frame the discussion. Both model approaches overlap in their implications, namely, ensuring that sufficient resources are devoted to monitoring coursework (to increase the probability that cheating and plagiarism are detected) and of providing sufficiently clear and severe institutional penalties (to counter-balance any expected benefits that the student may perceive to be available from cheating and plagiarism). Policy proposals are raised for further debate and consideration.     

国外多导仪犯罪心理测试的准确性评价与发展趋势

经过一百多年的发展,利用多导仪进行犯罪心理测试不同程度地被50多个国家所接受,但对于它的质疑并没有停止过。在对近年来国外关于准绳问题测试和隐蔽信息测试的评价与研究成果进行罗列及评价的基础上,可以发现,未来犯罪心理测试技术虽然由于其心理学原理的科学性而受到争议,并且对于测试人员的经验性要求较高,但是只要严格按照标准进行测试,其准确性仍然能够得到保障。     

Outsmarting the Liars: The Benefit of Asking Unanticipated Questions

We hypothesised that the responses of pairs of liars would correspond less with each other than would responses of pairs of truth tellers, but only when the responses are given to unanticipated questions. Liars and truth tellers were interviewed individually about having had lunch together in a restaurant. The interviewer asked typical opening questions which we expected the liars to anticipate, followed by questions about spatial and/or temporal information which we expected suspects not to anticipate, and also a request to draw the layout of the restaurant. The results supported the hypothesis, and based on correspondence in responses to the unanticipated questions, up to 80% of liars and truth tellers could be correctly classified, particularly when assessing drawings.